Yong Yoon Khong (R) receives a medical check-up at Tianjin First Center Hospital in north China's Tianjin Municipality, April 12, 2012. Yong, a 35-year-old Malaysian of Chinese origin, went to Tianjin First Center Hospital on Thursday to prepare for the donation of hematopoietic stem cells for a seven-year-old boy from central China's Anhui Province who is suffering from leukemia. Yong is expected to become the first foreign donor of hematopoietic stem cells registered in China Marrow Donor Program (CMDP). (Xinhua/Yue Yuewei)

Yong Yoon Khong (R) receives a medical check-up at Tianjin First Center Hospital in north China's Tianjin Municipality, April 12, 2012. Yong, a 35-year-old Malaysian of Chinese origin, went to Tianjin First Center Hospital on Thursday to prepare for the donation of hematopoietic stem cells for a seven-year-old boy from central China's Anhui Province who is suffering from leukemia. Yong is expected to become the first foreign donor of hematopoietic stem cells registered in China Marrow Donor Program (CMDP). (Xinhua/Yue Yuewei)